Патент USA US3086431код для вставки
April 23, 1963 n. c. HAMMAN 3,086,421 SHEET METAL NUT HAVING REGULAR POLYGONAL OPENING Filed Aug. 29, 1958 WITH HELICALLY DEFLECTED EDGES 2 sheetswsheet 1 INVENTOR. 1km??? CJ/mmm April 23, 1963 D. c. HAMMAN 3,086,421 SHEET METAL NUT HAVING REGULAR POLYGONAL OPENING Filed Aug. 29, 1958 WITH HELICALLY DEFLECTED EDGES 2 Sheets-Sheet 2 ' INVENTOR. Jeni/e7’ éj/ammm gQZww/M/ United States Patent“ 0 3,086,42 l' Patented Apr. 23, 1963 1 3 086 421 SHEET METAL NUT REGULAR POLYC ONAL OPENING W I T H HELICALLY DE FLECTED EDGES Denver C. Hamman, Palatine, 111., assignor to Illinois 2 FIG. 4 is a sectional view taken along line 4—4 in FIG. 3; FIG. 5 is an enlarged fragmentary sectional view show ing an assembly including the nut member of the present invention in greater detail; FIG. 6 is an enlarged fragmentary plan view of a nut member of the present invention showing a feature of the structure in greater detail; FIG. 7 is a plan view showing a nut member embody The present invention relates to a novel fastening de 10 ing a modi?ed form of the present invention; vice, and more particularly to a novel sheet material nut FIG. 8 is a cross sectional view taken along the line member. 8-8 in FIG. 7; The present invention contemplates a sheet material FIG. 9 is an enlarged sectional view taken along line nut member which is adapted to be applied to an un 9--9 in FIG. 7; threaded stud. It has been proposed to provide sheet ma FIG. 10 is a plan view showing another embodiment of Tool Works, Inc., a corporation of Delaware Filed Aug. 29, 1958, Ser. No. 758,016 5 Claims. (Cl. 85-32) terial nut members with means adapted to form or cut complementary threads in an unthreaded stud member during initial assembly ‘of the parts. However such here the present invention; FIG. 11 is a cross sectional view taken along line 11— 11 in FIG. ‘10, and tofore proposed nut members have not always been en FIG. 12 is a sectional view taken along line 12—12 tirely satisfactory for various reasons. For example, cer 20 in FIG. 10. tain of the prior proposals have been unduly di?icult and Referring now more speci?cally to the drawings where expensive to manufacture or subject to breakage as a in like parts are designated by the same numerals through result of constructions which cause concentration of out the various ?gures, a fastener or nut member 10‘ is stresses during application of the nut members to un shown, which nut member is formed from suitable sheet threaded studs. ‘In addition certain constructions which 25 material such as sheet steel. As will be discussed more have been proposed do not have su?icient holding power in detail below, the nut member 10 is particularly adapted for many installations or are not capable of easy and fast application to a stud in a manner which insures proper formation of the desired threads on the studs. It is an important object of the present invention to pro vide a novel sheet material nut member adapted to be applied to an unthreaded stud, which nut member may be relatively easily and economically produced and is con to be applied to a stud member 12 having a shank 14 which is initially smooth or unthreaded. It will be appre ciated that the nut and stud members may be used in vari ous assemblies for connecting workpieces 16 and 18. The one piece sheet material nut member 18 comprises a hollow central body 26 provided by an axially extend ing wall having a non-circular or hexagonal peripheral structed so as to have improved strength and holding con?guration so as to facilitate turning of the nut mem power. 35 ber by suitable tool means, not shown. An end wall 22 A more speci?c object of the present invention is to pro is formed integrally with and extends radially inwardly vide a novel sheet material nut member adapted to form from an outer end margin of the body 20, which end wall or cut complementary thread means in an unthreaded is provided with stud accommodating central aperture stud member, which nut member is constructed so as to means 24 which will be described more in detail below. minimize stress concentrations therein during application 40 A peripheral annular ?ange 26 extends axially and ra to a stud member so as to reduce any possibility of break dially outwardly from an integral junction with an inner age of the nut member. end of the body 20 so as to substantially increase the effec A further object of the present invention is to provide a novel sheet material fastener of the above described type which is constructed so that it may be relatively rapidly advanced onto a stud while still providing im proved holding power. Another more speci?c object of the present invention ' is to provide a novel sheet material nut member of the tive clamping area of the nut member. In addition, the ?ange 26 may be resiliently de?ected when the nut mem her is tightened against a workpiece so as to provide a spring action which causes the nut member to bind on the stud so as to resist unauthorized retrograde movement. It is to be noted that the ?ange 26 is preferably inclined at an angle of about 25° with respect to a plane contain above described type which ‘is constructed so that upon 50 ing the peripheral edge of the ?ange since this structure seating of the nut member against a workpiece, the driv enables the ?ange to function in the desired manner and ing torque arises abruptly to a value higher than the provides the flange with improved resistance to undue or stripping torque so as to resist the milling of an annular complete ?attening or axial collapsing. groove in the workpiece. For certain ‘installations it is desirable to provide an Still another object of the present invention is to pro 55 annular body 28 of priable sealing material within the vide a novel sheet material workpiece of the above de nut as shown in FIG. 5 so as to prevent the passage of scribed type which is constructed so that in the event the air, moisture, ‘dust or other foreign material through the nut member is over driven to a point where the thread apertures in the workpieces. The ?ange 26 is formed so formed on the stud member is stripped, the nut member as to present a relatively sharp peripheral edge for en 60 gagement with the workpiece 18 for preventing the es will cut or form new threads upon removal thereof. Other objects and advantages of the present invention cape of any of the sealing material around a major por will become apparent from the following description and the accompanying drawings wherein: tion of the ?ange periphery. However, the ?ange is provided with a plurality of relatively small peripheral recesses 30, 32 and 34 into which portions of the sealing FIG. 1 is a fragmentary perspective view showing a nut member incorporating features of the present invention 65 material are extruded as shown in FIG. 5. This provides assembled with a complementary stud member and a work a mechanical interlock between the sealing material and structure; FIG. 2 is an enlarged fragmentary partial sectional view taken along line 2——2 of the assembly shown in FIG. 1; the nut body which aids in preventing the sealing com FIG. 3 is a further enlarged plan view of a nut member incorporating features of the present invention; pound from shearing loose from the nut member during a tightening operation. These notches or recesses also 70 serve to present corners 36, 38 and 40 which are adapted aggressively to engage the workpiece 1-8 during a driving 3,086,421 3. 4 or tightening operation when the nut member has been tightened the desired amount. This engagement of the corners with the workpiece causes the driving torque to structures in that the peripheral margin of the ?ange 26b is polygonal in con?guration rather than circular so that rise abruptly higher than the torque necessary to strip straight edges ‘57 thereof. 'In the speci?c embodiment the threads on the stud. shown, the ?anges 26b is provided with an octagonal pe ripheral con?guration. With this structure, successive straight edge sections of the ?ange periphery will not track each other during tightening of the nut member against a workpiece so as to minimize any possibility This prevents the nut member from being rotated after the desired tightening has been accomplished so as to cause milling of an ‘annular groove in the workpiece. workpiece engageable corners 55 are presented between It is to be noted that in accordance with the present invention, the aperture means 24 in the end wallj22 is 10 of injury to the workpiece and so as to improve the en gagement of the corner portions with the workpiece in in the form of a polygonal ?gure. As shown in FIG. 3, this'?gure is preferably a substantially equilateral tri a manner which restrains unauthorized retrograde move angle although for certain applications a square ?gure ment of the nut. would be suitable. The corners of the triangular opening While the preferred embodiments of the present in vention have been shown and described herein, it is‘ obvi are rounded in the manner shown so as to minimize any possibility of a crackoccurring at such corners. It is fur ther to be noted that an intermediate portion of each ous that many structural details may be changed (With the stud are stripped and the nut has milled an annular groove around the stud. FIGS. 7-9 show a slightly modi?ed form of the present invention which is similar to the structure described above as indicated by the application of identical reference nu merals with the su?ix “a” added to corresponding ele section extending uninterruptedly from the straight side ments. This embodiment differs only in that the periph prising a hollow'axially extending body portion having out departing from the spirit and scope of the appended claims. side edge‘of the polygonal ‘central opening means 24 is helically de?ected along the circumference of'a circle so The invention is claimed as follows: 1. A one piece sheet material rotary nut member suit as to provide thread segments '42, 44 and 46.‘ The di 20 ameter of the circle of the arcuately and helically dis able for application to an unthreaded stud comprising an axially thin substantially planar section disposed trans posed thread segments is greater than the diameter of a circle which is tangent to all of the edges of the central ' versely of an axis of rotation of the nut member, said section having a generally centrally disposed equilateral opening 24 and less than the diameter of another circle triangular aperture means therethrough de?ned by initial which includes all of the corners of the opening means 24. ly substantially straight uninterrupted side edges extend It has been found that the above mentioned construction ing entirely between corners of the triangular aperture which is obtained by de?ecting the segments 42, 44 and 46 from initially straight margins of the central open means, intermediate portions of said edges located sub ing has substantially improved strength and resistance to stantially centrally between and spaced from corners of cracking or breaking under the stresses on the nut mem 30 said triangular aperture .eans and entirely within a ber ‘during application to an unthreaded stud. It will be circle disposed within said corners being helically de?ected appreciated that the arcuately and helically de?ected to provide a helical edge portion with a leading end sub thread segments 42, 44 and 46 are also inclined so as stantially in the plane of said section and a trailing end to present relatively sharp helically disposed corners 48, out of the plane of said section, each helical edge por 50 and 52 respectively which are adapted aggressively to tion being a portion of an individual helix disposed for engage the stud shank 14 and form a plurality of sepa threadedly engaging the stud whereby three individual rate complementary thread segments 54 therein. threads are formed on said stud, and said nut member As' shown best in FIG. 6, the junction 56 between the having inclined edge portions providing junctions be trailing end of the thread segment 44 and the straight edge tween trailing ends of said helical edge portions and said of the central opening is rounded. The thread segments substantially straight edges, which junctions are rounded 42 and 46 are provided with similar rounded corners 58 with an arch of substantial radius reversely directed with and 60 at the junctions of their trailing ends with the respect to said helical edge portions for facilitating straight edges of the polygonal opening. With this struc threaded engagement of the helical portions with said stud ture, the thread segments are adapted to form comple upon reverse rotation of the nut member, each said heli mentary threads in the stud shank during reverse rota cal edge portion and inclined edge portion being radially tion of the nut member. This feature facilitates removal outwardly with respect to said axis of a plane perpendicu of the nut in situations where the nut is inadvertently lar to said section which contains the straight edge por overdriven to a point where the ?rst threads formed in tions on either side thereof, the material of said planar edge at one side of said helical edge portion to the straight side edge on the opposite side of said helical edge portion to provide back-up strength for said helical edge portion and said inclined edge portion. 2. A one piece sheet material rotary nut member com eral ?ange ‘26a is formed so that it includes a plurality a noncircular transverse cross section, a substantially of ?at sections 51 integrally joined to each other by planar transverse end wall integral with outer end of said corner or rib portions 53. The corner or rib portions 53 which are relatively sharply bent as shown best in FIG. 9 provide the ?ange 26a'with substantial improved resist body portion, said wall having a generally centrally lo cated substantially equilateral polygonal aperture means therethrough de?ned by at least three initially substan ance to undue collapsing when the nut member is clamped tially straight edges extending substantially directly and against the workpiece, and the substantially ?at inclined without interruption between corners of the aperture means, intermediate portions of said edges located sub~ side sections or portions 51 provide a strut action which further increases the resistance of the ?ange to axial col lapsing. In FIGS. l0~12 there is shown another modi?ed form of the present invention which is similar to the structures described above ‘as indicated by the application of identi cal reference numerals with the su?ix “b” added to cor responding elements. This embodiment illustrates the manner in which the body portion 2012 may be formed in various di?erent shapes. More speci?cally the em~ stantially centrally between corners of the aperture means being helically de?ected to provide'a helical edge por tion with a leading ‘end substantially in the plane of said end wall and a trailing end out of the plane of said end wall, each helical edge portion being a portion of an individual helix disposed for threadedly engaging a stud member and the like whereby three individual threads are ‘formed on said stud, said nut member having in clined edge portions providing junctions between trail bodiment shows the body portion 26b as having a rec tangular or square shape rather than a hexagonal shape. , ing ends of said helical edge portions and said substan tially straight edges, which junctions are rounded with This embodiment also differs from the above described an arch of substantial radius reversely directed with 3,086,421 6 respect to said helical edge portions for facilitating threaded engagement of the helical portions with said 5. A one piece sheet material rotary nut member, as de?ned in claim 2, wherein said annular ?ange has a stud upon reverse rotation of the nut member, each said polygonal peripheral edge and includes corner portions helical edge portion and inclined edge portion being extending for engagement with a workpiece. radially outwardly with respect to said axis of a plane 5 perpendicular to said end wall which contains the straight edge portions on either side thereof, the material of said References Cited in the ?le of this patent UNITED STATES PATENTS planar end wall extending uninterruptedly from the straight side edge at one side of said helical edge portion to the straight side edge on the opposite side of said 10 helical edge portion to provide back-up strength for said helical edge portion and said inclined edge portion and a generally dome shaped annular ?ange integral with an end of said body portion opposite from said end wall, said ?ange extending radially outwardly and being in 15 clined axially away from said end wall at an angle of about 25° with respect to a plane containing a peripheral margin of the ?ange. ,3. A one piece sheet material nut member, as de?ned in claim 2, wherein said ?ange includes circumferentially 20 spaced relatively small peripheral recess means present ing corners engageable with a workpiece for resisting rotation of the nut member relative to the workpiece when the nut member is tightening against the workpiece. 779,751 Waitt _______________ _._ Jan. 10, 11905 932,396 Kenney _____________ __ Aug. 24, 1909 2,259,425 Murphy ______________ __ Oct. 14, .1941 2,284,081 2,335,205 2,335,367 Beggs ______________ __ May 26, 1942 Zepp _______________ _._ Nov. 23, 1943 Thompson ___________ __ Nov. 30, 1943 2,398,827 2,734,547 2,761,349 2,794,476‘ Graham ____________ __ Apr. 23, Hotchkin ____________ __ Feb. 14, Heller _______________ __ Sept. 4, Hanneman ____________ __ June 4, 27,895,362’ 2,928,445 2,930,424 2,969,705 Jamgotchian _, _________ __ July 21, 1959 Van Buren ___________ __ Mar. 15, 1960 Van Buren ___________ _._ ‘Mar. 29, 1960 2,986,059 Dulfy _______________ __ May 30, i19611 4. A one piece sheet material nut member, as de?ned 25 Becker ______________ __ Jan. 3.1, 1961 OTHER REFERENCES in claim 2, wherein said annular ?ange comprises cir cumferentially arranged substantially planar sections, and generally radially extending rib portions disposed between and integrally joining said planar sections. 1946 1956 195-6 1957 Automotive Industries, volume 115, page 141, Oct. 15, 1956.